Create categories in rails App - ruby-on-rails

Question

I would like to create categories in my app:
I got inspired by this question
But when #RailsGuy says: "Create some categories by categories controller and form (I don't think, I need to tell you that stuff, you are able to do it yourself)"
I felt lost...
How and where do I create my list of categories? dogs, cats, birds...
I saw that it could be done in the console but I will display a different pictures for each categories...
Here is my _form.html.slim
= simple_form_for #tuto do |f|
- if #tuto.errors.any?
#error_explanation
h2 = "#{pluralize(#tuto.errors.count, "error")} prohibited this tuto from being saved:"
ul
- #tuto.errors.full_messages.each do |message|
li = message
= f.hidden_field :user_id, value: current_user.id
= f.input :title
= f.collection_select :category_id, Category.all, :id, :name, {prompt: "Choose Category"}
= f.input :content, as: :text, input_html: { rows: "15" }
= f.button :submit, "Save"
my models:
tuto_model.rb
class Tuto < ActiveRecord::Base
acts_as_votable
belongs_to :user
belongs_to :category
validates :category, presence: true
end
categoty_model.rb
class Category < ActiveRecord::Base
has_many :tutos
end
schema.rb
ActiveRecord::Schema.define(version: 20160920133801) do
create_table "categories", force: :cascade do |t|
t.string "name"
t.text "description"
t.string "image"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "tutos", force: :cascade do |t|
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "title"
t.text "content"
t.integer "user_id"
t.integer "category_id"
end
add_index "tutos", ["user_id"], name: "index_tutos_on_user_id"
create_table "users", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "first_name"
t.string "last_name"
t.boolean "admin"
end
add_index "users", ["email"], name: "index_users_on_email", unique: true
add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
create_table "votes", force: :cascade do |t|
t.integer "votable_id"
t.string "votable_type"
t.integer "voter_id"
t.string "voter_type"
t.boolean "vote_flag"
t.string "vote_scope"
t.integer "vote_weight"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "votes", ["votable_id", "votable_type", "vote_scope"], name: "index_votes_on_votable_id_and_votable_type_and_vote_scope"
add_index "votes", ["voter_id", "voter_type", "vote_scope"], name: "index_votes_on_voter_id_and_voter_type_and_vote_scope"
end
thanks a lot for your help

Answer 1

Have the pictues stored in assets. And in the form/view use a conditional?:
<% if tuto.category == dog %>
<%= image_tag 'dog.jpg' %>
<% end %>
Something like that?
Steve.

Answer 2

The other post says to use the controller and form to create new categories. If you used scaffold to create the model Category, you'll have the new & create action in the controller and a new.html.erb and index.html.erb (or.slim if you're using that).
You can create your categories in there, then select one in your Tuto model.
Make sense?
Steve.